fixed split-path tests; found a bug in powershell
fixed split-path tests; found a bug in powershell

KarolKaczmarek/PowerShell,PaulHigin/PowerShell,daxian-dbw/PowerShell,kmosher/PowerShell,kmosher/PowerShell,TravisEz13/PowerShell,jsoref/PowerShell,bmanikm/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,bingbing8/PowerShell,bmanikm/PowerShell,daxian-dbw/PowerShell,JamesWTruher/PowerShell-1,jsoref/PowerShell,TravisEz13/PowerShell,kmosher/PowerShell,KarolKaczmarek/PowerShell,TravisEz13/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,kmosher/PowerShell,jsoref/PowerShell,bingbing8/PowerShell,bmanikm/PowerShell,KarolKaczmarek/PowerShell,JamesWTruher/PowerShell-1,daxian-dbw/PowerShell,kmosher/PowerShell,bingbing8/PowerShell,JamesWTruher/PowerShell-1,KarolKaczmarek/PowerShell,bingbing8/PowerShell,jsoref/PowerShell,bingbing8/PowerShell,daxian-dbw/PowerShell,bmanikm/PowerShell,jsoref/PowerShell,KarolKaczmarek/PowerShell,bmanikm/PowerShell,TravisEz13/PowerShell